Floor-scrubbing machine



Oct. 15, 1929. R. T. PLUMMER Er AL FLOOR SCRUBBING MACHINE Filed June 9, 1927 2 Sheets-Sheet 1 :r.k...-.................e...5...............-......,...........wha

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FLOOR SCRUBBING MACHINE Filed June 9, 1927 2 Sheets-Sheet 2 Patented Oct. 15, 1929 UNITED STATES PATENT yOFFICEv RICHARD T. PLUMMER, or DULUTH, MINNESOTA, AND ELIAS A. PALO, or

FoRsYTH, MONTANA FLooR-scRUBBING MACHINE Application filed June 9, 1927.- -Se`al No. 197,542.

This invention relates to floor washing machines and has special reference to a power driven floor washer or scrubber.

The principal object is to produce a simple, practical, and efficient device of this character having maximum capacity for scrubbing and washing a floor.

Other objects and advantages of the invention will appear in the further description thereof.

Referring now to the accompanying drawing, forming part of this application and wherein like reference characters indicate like parts:

Figure 1 is a side elevation of the internal mechanism with the cover removed;

Figure 2 is a section on the line 2-2 of Figure 1; and

Figure 3 is a vertical transverse section through the machine with the cover applied thereto.

The chassis of t-he mechanism comprises two spaced substantially triangularly shaped frames7 one of which is indicated at 1 and the other at 1, they preferably being o-f metal. Thev chassis is of a size to be conveniently rolled about by hand, there being pivotally mounted thereupon a handle bar indicated at 2 for .such purpose. Centrally within the chassis is mounted a tank indicated at 3, it being smaller at the top than at the bottom as viewed from the side of the scrubber, and flared somewhat as at l for convenient discharge of the water thereinto. Beneath this tank and transverse the centermost portion of the machine are two spaced scrubbing rollers indicated at 5, they being` journalled within the chassis, and the shaft of each roller carries at one end a driving sprocket wheel 6. Y

Parallel with the scrubbing rollers 5 and upon either side thereof is a pair of belt carrying rollers 7 and 8, and adjacent the upper end of the tank 3 and also parallel with the previously described rollers and brushes are similarly shaped rollers 9, the shaft of each 0f which carries a sprocket as indicated at 10. Still farther above the rollers 9, slightly inwardly thereof, and for contact with the belt ypassing over said rollers are the compressing or squeezing rollers 11, the shafts of each of which carry a sprocket 12. An endless moistureabsorbing belt of any desired structure isindicated at 13, and is carried. about each set of rollers 7 8 and 9, the innermost portion of each belt 13 running substantially parallel with the side walls of the inclined tank 3'to ak point just above the flared upper end of same wherevit is engaged by the squeezing rollers 11 and the major portion of any moisture carried thereby is squeezed therefrom into the tank, and the .squeezing rollers are carried in brackets indicated at 1li which, as clearly shown, are made. adjustable so that the squeezing effect of the rollers 11 may be increased or decreased as desired.

A cock is shown at 15 in the bottom of the tank and occurs intermediate of the scrubbing rollers 5, the same being operated by ay longitudinally disposed rod 16 passing'to the side of the scrubber for adjusting the dischargev of the cock as desired Vduring ther scrubbing process.

17 represents an electric motor attached to one inclined face of the chassis for` imparting power to the large sprocket 18by means ofy the small sprocket 19 on the armature of the motor and the sprocket chain 20 about the.

sprockets18 and 19. Onv the shaft 21 of the sprocket 18 `and Vinwardly of the latter is mounted a small sprocket 22 about which and inwardly thereof is passedthe sprocket chain 23 which extends upwardly about the inner circumferential face of a'sprocket 10 and thence upwardly about one of the sprockets 12 and beneath the other Yone as clearly seen.

in Figure 1 of the drawings; thence outwardly and about the sprocket 10 on the opposite side of the chassis, downwardly to the adjustable idler sprocket 24 adjacent the lower corner of the tank, thence over the first sprocket 6 upon one of the scrubbing brushes 5, downwardly beneath. and about the other sprocket 6 on the other scrubbing roller, from whence it returns to the sprocket 22. l

This arrangement it is obvious will when the motor and sprocketlS are rotated clockwise as viewed in Figurey 1 of the drawings cause the scrubbing rollers to rotate and also rotate the absorbing belts 13, their inner faces traveling upwardly and carrying the incisture or waste water to be squeezed out above the tank by the rollers 11, and the belts 18 5 engaging the floor upon which the machine is rolled about going in opposite directions will not tend to abnormally force the machine in either direction so that it may be conveniently rolled about upon the floor sur-v face. To facilitate this rolling motion of the scrubber there is provided a roller or wheel 25 loosely mounted upon the aXle and at either end of the extreme outer rollers 8, these wheels being just a trifle less in diameter than the rollers 8 with the belts thereupon so that the belt will touch the floor just sufii'cien-tly for thegathering of the water and not carry the entire weight of the machine. From the above it is evident that we have 2Q devised a very simple, compact, and practical scrubbing` machine, particularly adapted for use in places having large floor area to be cared for, and having thus described our invention, what we claim and desire to secure by Letters Patent, is: i

A floor washing machine of the type described including an upright chassis frame, belt carrying and chassis supporting shafts adjacent opposite ends of the chassis, an auX- iliary bel-t carrying shaft adjacent each of the first mentioned shafts and parallel therewith, a roller upon each of said shafts for supporting the belt, shafts and rollers in the upper portion of the chassis for supporting and Voperating the belts, a pair 'of scrubbing rollers intermediate of the chassis supporting shafts, means for simultaneously operating the scrubbing rollers in opposite directions and the belts in opposite directions, water 40 supply means'above the scrubbing rollers, and means whereby the washing machine may be operated in either direction. In testimony whereof we our signatures. y RCHARD T. PLUMMER.

ELIAS A. PALO. 

